Pola Kerapatan dan Keragaman Tegakan Hutan Dipterokarpa Sekunder
DOI:
https://doi.org/10.59465/jpht.v17i1.816Kata Kunci:
Bidang dasar, indeks keanekaragaman, kelimpahan jenis, indeks kemerataan, kerapatanAbstrak
Penilaian pemulihan hutan sekunder dipterokarpa mempunyai parameter penting, yaitu kerapatan tegakan dan keragaman komposisi jenis hutan. Penelitian ini bertujuan untuk mengetahui kecenderungan pola perubahan kerapatan dan keragaman tegakan pada hutan alam dipterokarpa sekunder berdasarkan variasi umur tebangan sebagai proyeksi tingkat pemulihan (recovery) alami yang terjadi pada hutan alam produksi. Penelitian dilaksanakan di IUPHHK Hutan Alam PT Gunung Gajah Abadi, Wahau, Kalimantan Timur. Periode pengumpulan data pada tahun 2016-2019 dengan pembuatan plot sampling temporer sebanyak 11 plot (seluas 11 ha) pada tujuh variasi umur tebangan. Parameter kerapatan (jumlah pohon dan bidang dasar per satuan luas) dan keragaman (jumlah jenis, indeks keanekaragaman, kelimpahan jenis dan indeks kemerataan jenis) tegakan hutan sekunder dipterokarpa akan bervariasi sepanjang umur tebangan. Bentuk hubungan parameter kerapatan tegakan, indeks kelimpahan dan indeks kemerataan jenis adalah berbentuk regresi logaritma, sedangkan untuk parameter bidang dasar tegakan, jumlah dan indeks keanekaragaman jenis berbentuk regresi polynomial atau kuadratik. Umur tegakan setelah penebangan merupakan faktor yang memengaruhi cukup besar terhadap komposisi jumlah jenis, tetapi tidak cukup besar untuk parameter kerapatan dan keragaman tegakan lainnya
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